Question

For the function rule y = -2x - 3, provide the x-y coordinates of the y-intercept and the x-intercept.

Answer 1

The x and y intercepts are always going to be when the other is 0. Try plugging 0 in for each variable (one at a time) and your result should be the coordinate.

Answer 2

can you give some example please

Answer 3

(3/2 , -3)
(0 , -5 )
(1/2 , -7)

Answer 4

y-intercept

y = -2x - 3

y = -2(0) - 3

y = ???

Answer 5

-3

Answer 6

so the y-intercept is (0, -3)

Answer 7

x- intercept y intercept
(0, 3/2 ) (0, -3)
(1 , 0) (1, -5)
( 2, 1/2 ) (2, -7)

Answer 8

now is it correct

Answer 9

the x-intercept is found by plugging in y = 0 and solving for x

y = -2x - 3

0 = -2x - 3

3 = -2x

3/(-2) = x

x = -3/2 or x = -1.5

so the x-intercept is the point (-3/2, 0) or (-1.5, 0)

Answer 10

but i thought when we will -2 on the let side it will become +ve

Answer 11

not sure what you mean

Answer 12

when we moved -2 from the right side to the left side will it not become +2

Answer 13

no you move the -3 over first

Answer 14

then you move the -2 over

Answer 15

so you first add 3 to both sides

Answer 16

then you divide both sides by -2

Answer 17

so the coordinates i have given are wrong

Answer 18

for the x-intercept, yes

Answer 19

it should be (-3/2, 0) or (-1.5, 0)

Answer 20

so we just have to give 1 coordinate

Answer 21

you mean one point?

yes you give one point because there is only one x-intercept

Answer 22

and there is only one y-intercept

Answer 23

i means we will not be imagining 1 instead of zero now

Answer 24

what do you mean

Answer 25

for example let x= 1 instead of zero

Answer 26

ah i see, so you're looking for other points now

Answer 27

you can do that, it just won't be called the x or y intercept

Answer 28

ok thanks

Answer 29

yw